Tire-inflating device.



H. STAHL.

TIRE INPLATING DEVICE.

APPLICATION FILED MAR.6,1913

1,115,122. Patented 001.211.914.

HERMAN STAHL, OF ERIE, PENNSYLVANIA.

TIREJNFLATING DEVICE.

Specification of Letters Patent.

Patented (het. 27, 1914.

Application tiled March 6, 1913. Serial No. 752.526.

To all whom t may concern Be it known that I, HERMAN STAHL, citi zen ofthe United States, residing at Erie, in the county of Erie and State ofPennsylvania, have invented certain new and useful lmprovements in'liie-Iniating Devices, of which the following is a specification.

This invention relates to an improvement in tire iniiating devices.

The primary object of the invention is to provide a device supported bya pneumatic tired wheel which, when the wheel is in motion, willconstantly supply air to the tire.

Another object of the invention is to provide a construction inwhich theair in the tire may be maintained at a predetermined pressure, that is,the constant supply of air may not rise above a certain pressure whichwould tend to. burst the tube.

A still further object of the invention is to provide a constructionwhich may be supported on the spokes of a wheel and which, while formingan effective pump, will not interfere with the movement of the wheel, oritself be disarranged by said movement.

For a full understanding of the invention, reference is to be had to thefollowing description and accompanying drawing, in which:

Figure 1 is an elevation showing the device arranged on a pneumatictired wheel; Fig. 2 is a sectional view of the casing which houses thepump; and Fig. 3 is an end elevation of the device.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawing by the samereference characters.

1n the drawing, 10 designates the wheel which is of the usualconstruction, being provided with spokes 11. A casing 12 is secured toone of the spokes, said casing being preferably rectangular andconstructed of metal.

The rear wall 13 of the casing is provided with an extension 14, thecasing being bolted or secured by means of brackets to the spoke 11. Aplurality of spaced diaphragms 15 and 16 are arranged within the casing,said diaphragms being constructed of wood, a metallic plate 17 beingarranged on the outer faces of the same. A coiled spring 18 normallyspaces these diaphragms, the

coiled spring being disposed centrally of the same.

The upper diaphragm is secured to the top plate 19 of the casing, one ofthe terminal convolutions of the spring 18 being secured to the innerface of the diaphragm 16. A flexible cylindrical member 15,preferablyconstructed of leather, is secured to each of the diaphragms, themembers embracing and being secured to the edges of the same. A plungerrod 20 is secured to the lower diaphragm, said plunger rod extendingthrough an opening 21 formed in the lower plate 22 of the casing. Thisplunger rod passes through the guide 23 which is supported by the plate14, the rod projecting beyond the tire 24, being provided at itsterminal with a longitudinally curved plate 25 which extends over thetire.

When the wheel rotates to bring the plate 25 in contact with the ground,the pressure l on the rod 20 will move the diaphragm V15 against thetension of the spring 18, it being understood that when the diaphragmeare spaced by the spring, as shown in Fig. 2,*the p ate 25 will bespaced from the tire. Thus, the periodical contact of the plate-25 withthe ground will cause the reciprocation of the rod 20 which Will movethe diaphragm 15 toward the diaphragm' 16. The air compressed betweenthe diaphragms by this movement passes out through the tube 26 which isconnected to the valve 27 of the tire. It will be seen that the travelof the wheel will constantly supply air to the tire.

The lower diaphragm l5 is provided with a plurality of Hap valves 28which allow for the free return movement of the diaphragm which iscaused by the spring 18. The upper diaphragm 16 is providedwith anopening 29 in which is seated a valve 30. This valve is maintained incontact with the seat 3l by means of a spring 32. The tension of thisspring may be regulated by the set-screw 33 which bears against thespring intermediate of the point 34 where it is secured' to the outerface of the casin and the point where it is secured to the vave 30. Theset-screw 33 is supported by a portion 3G of the frame 36 which forms .apart of the casing.

1t will be obvious by this construction that.

this character will be clearly apparent, as it will be noted that thedevice provides an eliiectual means for maintaining' the tire inflat-edwithout danger of over inflation.

it will also be noted that the structure is such as may be easily andeconomically manufactured, and that it may be readily positioned onpneumatic tired wheels without in any way altering their construction oraii'ecting their movement.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent is:

l. A tire inlating device comprising a casing supported by the spoke ofa pneumatic tired wheel, a plurality of diaphragme arranged in saidcasing, one of the diaphragme being secured to the top of the casing, acoiledspring interposed between the dia'- phragms and normallymaintaining the other diaphragm adjacent the base of the casing, aplunger connected to said other diaphragm and projecting through thecasing, a longitudinally curved plate supported by the plunger anddisposed to extend transversely of the tire, a flexible hollow memberhaving its ends secured to, the diaphragms, and a connection between thechamber formed by the diaphragme, and said flexible member and the valveof the tire.

2. A tire inating device for pneumatic tired wheels includin a casingcarried by the wheel, a fixed diap ragm, and a movable diaphragm, botharranged in the casing, a flexible envelop connectin the diaphragms andforming an air cham er therebetween, valves controlling the inlet andoutlet of air into the air chamber, and a rod carriedlby the movablediaphragm and mounted for reciprocation through the wall of the casing,said rod extending radially beyond the rim of the wheel, and means forconducting air from the air chamber to the tire of the wheel.

3. The combination with a wheel having a pneumatic tire, of a tireinflating device including a casing attached to the wheel, a fixeddiaphragm, and a movable diaphragm, both arranged within the casing, aexible envelop connecting the diaphragms and forming an air chambertherebetween, a rod mounted for reciprocation through the wall of thecasing and connected to the movable diaphragm, said rod extending beyondthe periphery of the wheel, whereby it will engage the road once duringeach revolution of the wheel for periodically reciprocatino' the movablediaphragm, and valves controling the inlet and outlet of air into theair chamber.l

In testimony whereof I aiiix my signature in presence of two witnesses.

. Witnesses: l u H. H. STRIGKER,

GUSTAV STEMMER.

